Peep Door / View Port / Sight Port

• Peep doors are provided in radiant section of the heater to allow viewing of burner flames, tubes, tube supports, and refractory

• Critical areas of observation include burner flames and pilots, hottest portion of tubes

• Peep doors should be accessible from Grade or from Platforms.

Glass Peep Door

• Consists of a front high-temperature glass pane, handle and a flap

• Pull down the handle to lift the flap behind the glass pane

• The operator can look into the firebox through the glass pane

• The glass pane is heat and breakage resistant.

Side-Hinged Peep Door

• Consists of a spring handle, side-hinged door, and locking lever.

• Door contains ceramic fiber packing with SS Liner.

• The locking lever ensures tight closing of the door.

• Operator has to unhook the locking lever and open the door

Peep Door Blocks

• Peep door blocks are made from a special vacuum manufacturing process. These offer the best strength and rigidity.

• Peep door blocks made from Folded blanket module.